I would like to use the analog read on the arduino to measure the voltage from a usb pocket solar charger.Would connecting the solar charger directly to the analogread could damage the arduino?

I think voltage of the solar charger is 3.3 - 5v and max current 500ma.

basically I want to point a laser at the solar cell and when it reaches a certain threshold {do something}.

charger like this http://www.ebay.co.uk/itm/Solar-Battery-Panel-USB-Charger-for-Cell-Phone-MP3-PDA-/320671026383?pt=UK_MobilePhones_MobilePhoneAccessories_MobilePhoneChargers&hash=item4aa97b8ccf#ht_3733wt_1396